1 | <?php |
---|
2 | /** |
---|
3 | * WordPress GD Image Editor |
---|
4 | * |
---|
5 | * @package WordPress |
---|
6 | * @subpackage Image_Editor |
---|
7 | */ |
---|
8 | |
---|
9 | /** |
---|
10 | * WordPress Image Editor Class for Image Manipulation through GD |
---|
11 | * |
---|
12 | * @since 3.5.0 |
---|
13 | * @package WordPress |
---|
14 | * @subpackage Image_Editorsave |
---|
15 | * @uses WP_Image_Editor Extends class |
---|
16 | */ |
---|
17 | class WP_Image_Editor_GD extends WP_Image_Editor { |
---|
18 | |
---|
19 | protected $image = false; // GD Resource |
---|
20 | |
---|
21 | function __destruct() { |
---|
22 | if ( $this->image ) { |
---|
23 | // we don't need the original in memory anymore |
---|
24 | imagedestroy( $this->image ); |
---|
25 | } |
---|
26 | } |
---|
27 | |
---|
28 | /** |
---|
29 | * Checks to see if current environment supports GD. |
---|
30 | * |
---|
31 | * @since 3.5.0 |
---|
32 | * @access public |
---|
33 | * |
---|
34 | * @return boolean |
---|
35 | */ |
---|
36 | public static function test( $args = array() ) { |
---|
37 | if ( ! extension_loaded('gd') || ! function_exists('gd_info') ) |
---|
38 | return false; |
---|
39 | |
---|
40 | // On some setups GD library does not provide imagerotate() - Ticket #11536 |
---|
41 | if ( isset( $args['methods'] ) && |
---|
42 | in_array( 'rotate', $args['methods'] ) && |
---|
43 | ! function_exists('imagerotate') ){ |
---|
44 | |
---|
45 | return false; |
---|
46 | } |
---|
47 | |
---|
48 | return true; |
---|
49 | } |
---|
50 | |
---|
51 | /** |
---|
52 | * Checks to see if editor supports the mime-type specified. |
---|
53 | * |
---|
54 | * @since 3.5.0 |
---|
55 | * @access public |
---|
56 | * |
---|
57 | * @param string $mime_type |
---|
58 | * @return boolean |
---|
59 | */ |
---|
60 | public static function supports_mime_type( $mime_type ) { |
---|
61 | $image_types = imagetypes(); |
---|
62 | switch( $mime_type ) { |
---|
63 | case 'image/jpeg': |
---|
64 | return ($image_types & IMG_JPG) != 0; |
---|
65 | case 'image/png': |
---|
66 | return ($image_types & IMG_PNG) != 0; |
---|
67 | case 'image/gif': |
---|
68 | return ($image_types & IMG_GIF) != 0; |
---|
69 | } |
---|
70 | |
---|
71 | return false; |
---|
72 | } |
---|
73 | |
---|
74 | /** |
---|
75 | * Loads image from $this->file into new GD Resource. |
---|
76 | * |
---|
77 | * @since 3.5.0 |
---|
78 | * @access protected |
---|
79 | * |
---|
80 | * @return boolean|\WP_Error |
---|
81 | */ |
---|
82 | public function load() { |
---|
83 | if ( $this->image ) |
---|
84 | return true; |
---|
85 | |
---|
86 | if ( ! is_file( $this->file ) && ! preg_match( '|^https?://|', $this->file ) ) |
---|
87 | return new WP_Error( 'error_loading_image', __('File doesn’t exist?'), $this->file ); |
---|
88 | |
---|
89 | // Set artificially high because GD uses uncompressed images in memory |
---|
90 | @ini_set( 'memory_limit', apply_filters( 'image_memory_limit', WP_MAX_MEMORY_LIMIT ) ); |
---|
91 | $this->image = @imagecreatefromstring( file_get_contents( $this->file ) ); |
---|
92 | |
---|
93 | if ( ! is_resource( $this->image ) ) |
---|
94 | return new WP_Error( 'invalid_image', __('File is not an image.'), $this->file ); |
---|
95 | |
---|
96 | $size = @getimagesize( $this->file ); |
---|
97 | if ( ! $size ) |
---|
98 | return new WP_Error( 'invalid_image', __('Could not read image size.'), $this->file ); |
---|
99 | |
---|
100 | $this->update_size( $size[0], $size[1] ); |
---|
101 | $this->mime_type = $size['mime']; |
---|
102 | |
---|
103 | return true; |
---|
104 | } |
---|
105 | |
---|
106 | /** |
---|
107 | * Sets or updates current image size. |
---|
108 | * |
---|
109 | * @since 3.5.0 |
---|
110 | * @access protected |
---|
111 | * |
---|
112 | * @param int $width |
---|
113 | * @param int $height |
---|
114 | */ |
---|
115 | protected function update_size( $width = false, $height = false ) { |
---|
116 | if ( ! $width ) |
---|
117 | $width = imagesx( $this->image ); |
---|
118 | |
---|
119 | if ( ! $height ) |
---|
120 | $height = imagesy( $this->image ); |
---|
121 | |
---|
122 | return parent::update_size( $width, $height ); |
---|
123 | } |
---|
124 | |
---|
125 | /** |
---|
126 | * Resizes current image. |
---|
127 | * Wraps _resize, since _resize returns a GD Resource. |
---|
128 | * |
---|
129 | * @since 3.5.0 |
---|
130 | * @access public |
---|
131 | * |
---|
132 | * @param int $max_w |
---|
133 | * @param int $max_h |
---|
134 | * @param boolean $crop |
---|
135 | * @return boolean|WP_Error |
---|
136 | */ |
---|
137 | public function resize( $max_w, $max_h, $crop = false ) { |
---|
138 | if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) |
---|
139 | return true; |
---|
140 | |
---|
141 | $resized = $this->_resize( $max_w, $max_h, $crop ); |
---|
142 | |
---|
143 | if ( is_resource( $resized ) ) { |
---|
144 | imagedestroy( $this->image ); |
---|
145 | $this->image = $resized; |
---|
146 | return true; |
---|
147 | |
---|
148 | } elseif ( is_wp_error( $resized ) ) |
---|
149 | return $resized; |
---|
150 | |
---|
151 | return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); |
---|
152 | } |
---|
153 | |
---|
154 | protected function _resize( $max_w, $max_h, $crop = false ) { |
---|
155 | $dims = image_resize_dimensions( $this->size['width'], $this->size['height'], $max_w, $max_h, $crop ); |
---|
156 | if ( ! $dims ) { |
---|
157 | return new WP_Error( 'error_getting_dimensions', __('Could not calculate resized image dimensions'), $this->file ); |
---|
158 | } |
---|
159 | list( $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ) = $dims; |
---|
160 | |
---|
161 | $resized = wp_imagecreatetruecolor( $dst_w, $dst_h ); |
---|
162 | imagecopyresampled( $resized, $this->image, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); |
---|
163 | |
---|
164 | if ( is_resource( $resized ) ) { |
---|
165 | $this->update_size( $dst_w, $dst_h ); |
---|
166 | return $resized; |
---|
167 | } |
---|
168 | |
---|
169 | return new WP_Error( 'image_resize_error', __('Image resize failed.'), $this->file ); |
---|
170 | } |
---|
171 | |
---|
172 | /** |
---|
173 | * Processes current image and saves to disk |
---|
174 | * multiple sizes from single source. |
---|
175 | * |
---|
176 | * @since 3.5.0 |
---|
177 | * @access public |
---|
178 | * |
---|
179 | * @param array $sizes { {'width'=>int, 'height'=>int, 'crop'=>bool}, ... } |
---|
180 | * @return array |
---|
181 | */ |
---|
182 | public function multi_resize( $sizes ) { |
---|
183 | $metadata = array(); |
---|
184 | $orig_size = $this->size; |
---|
185 | |
---|
186 | foreach ( $sizes as $size => $size_data ) { |
---|
187 | $image = $this->_resize( $size_data['width'], $size_data['height'], $size_data['crop'] ); |
---|
188 | |
---|
189 | if( ! is_wp_error( $image ) ) { |
---|
190 | $resized = $this->_save( $image ); |
---|
191 | |
---|
192 | imagedestroy( $image ); |
---|
193 | |
---|
194 | if ( ! is_wp_error( $resized ) && $resized ) { |
---|
195 | unset( $resized['path'] ); |
---|
196 | $metadata[$size] = $resized; |
---|
197 | } |
---|
198 | } |
---|
199 | |
---|
200 | $this->size = $orig_size; |
---|
201 | } |
---|
202 | |
---|
203 | return $metadata; |
---|
204 | } |
---|
205 | |
---|
206 | /** |
---|
207 | * Crops Image. |
---|
208 | * |
---|
209 | * @since 3.5.0 |
---|
210 | * @access public |
---|
211 | * |
---|
212 | * @param string|int $src The source file or Attachment ID. |
---|
213 | * @param int $src_x The start x position to crop from. |
---|
214 | * @param int $src_y The start y position to crop from. |
---|
215 | * @param int $src_w The width to crop. |
---|
216 | * @param int $src_h The height to crop. |
---|
217 | * @param int $dst_w Optional. The destination width. |
---|
218 | * @param int $dst_h Optional. The destination height. |
---|
219 | * @param boolean $src_abs Optional. If the source crop points are absolute. |
---|
220 | * @return boolean|WP_Error |
---|
221 | */ |
---|
222 | public function crop( $src_x, $src_y, $src_w, $src_h, $dst_w = null, $dst_h = null, $src_abs = false ) { |
---|
223 | // If destination width/height isn't specified, use same as |
---|
224 | // width/height from source. |
---|
225 | if ( ! $dst_w ) |
---|
226 | $dst_w = $src_w; |
---|
227 | if ( ! $dst_h ) |
---|
228 | $dst_h = $src_h; |
---|
229 | |
---|
230 | $dst = wp_imagecreatetruecolor( $dst_w, $dst_h ); |
---|
231 | |
---|
232 | if ( $src_abs ) { |
---|
233 | $src_w -= $src_x; |
---|
234 | $src_h -= $src_y; |
---|
235 | } |
---|
236 | |
---|
237 | if ( function_exists( 'imageantialias' ) ) |
---|
238 | imageantialias( $dst, true ); |
---|
239 | |
---|
240 | imagecopyresampled( $dst, $this->image, 0, 0, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h ); |
---|
241 | |
---|
242 | if ( is_resource( $dst ) ) { |
---|
243 | imagedestroy( $this->image ); |
---|
244 | $this->image = $dst; |
---|
245 | $this->update_size(); |
---|
246 | return true; |
---|
247 | } |
---|
248 | |
---|
249 | return new WP_Error( 'image_crop_error', __('Image crop failed.'), $this->file ); |
---|
250 | } |
---|
251 | |
---|
252 | /** |
---|
253 | * Rotates current image counter-clockwise by $angle. |
---|
254 | * Ported from image-edit.php |
---|
255 | * |
---|
256 | * @since 3.5.0 |
---|
257 | * @access public |
---|
258 | * |
---|
259 | * @param float $angle |
---|
260 | * @return boolean|WP_Error |
---|
261 | */ |
---|
262 | public function rotate( $angle ) { |
---|
263 | if ( function_exists('imagerotate') ) { |
---|
264 | $rotated = imagerotate( $this->image, $angle, 0 ); |
---|
265 | |
---|
266 | if ( is_resource( $rotated ) ) { |
---|
267 | imagedestroy( $this->image ); |
---|
268 | $this->image = $rotated; |
---|
269 | $this->update_size(); |
---|
270 | return true; |
---|
271 | } |
---|
272 | } |
---|
273 | return new WP_Error( 'image_rotate_error', __('Image rotate failed.'), $this->file ); |
---|
274 | } |
---|
275 | |
---|
276 | /** |
---|
277 | * Flips current image. |
---|
278 | * |
---|
279 | * @since 3.5.0 |
---|
280 | * @access public |
---|
281 | * |
---|
282 | * @param boolean $horz Horizontal Flip |
---|
283 | * @param boolean $vert Vertical Flip |
---|
284 | * @returns boolean|WP_Error |
---|
285 | */ |
---|
286 | public function flip( $horz, $vert ) { |
---|
287 | $w = $this->size['width']; |
---|
288 | $h = $this->size['height']; |
---|
289 | $dst = wp_imagecreatetruecolor( $w, $h ); |
---|
290 | |
---|
291 | if ( is_resource( $dst ) ) { |
---|
292 | $sx = $vert ? ($w - 1) : 0; |
---|
293 | $sy = $horz ? ($h - 1) : 0; |
---|
294 | $sw = $vert ? -$w : $w; |
---|
295 | $sh = $horz ? -$h : $h; |
---|
296 | |
---|
297 | if ( imagecopyresampled( $dst, $this->image, 0, 0, $sx, $sy, $w, $h, $sw, $sh ) ) { |
---|
298 | imagedestroy( $this->image ); |
---|
299 | $this->image = $dst; |
---|
300 | return true; |
---|
301 | } |
---|
302 | } |
---|
303 | return new WP_Error( 'image_flip_error', __('Image flip failed.'), $this->file ); |
---|
304 | } |
---|
305 | |
---|
306 | /** |
---|
307 | * Saves current in-memory image to file. |
---|
308 | * |
---|
309 | * @since 3.5.0 |
---|
310 | * @access public |
---|
311 | * |
---|
312 | * @param string $destfilename |
---|
313 | * @param string $mime_type |
---|
314 | * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string} |
---|
315 | */ |
---|
316 | public function save( $filename = null, $mime_type = null ) { |
---|
317 | $saved = $this->_save( $this->image, $filename, $mime_type ); |
---|
318 | |
---|
319 | if ( ! is_wp_error( $saved ) ) { |
---|
320 | $this->file = $saved['path']; |
---|
321 | $this->mime_type = $saved['mime-type']; |
---|
322 | } |
---|
323 | |
---|
324 | return $saved; |
---|
325 | } |
---|
326 | |
---|
327 | protected function _save( $image, $filename = null, $mime_type = null ) { |
---|
328 | list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type ); |
---|
329 | |
---|
330 | if ( ! $filename ) |
---|
331 | $filename = $this->generate_filename( null, null, $extension ); |
---|
332 | |
---|
333 | if ( 'image/gif' == $mime_type ) { |
---|
334 | if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) |
---|
335 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
---|
336 | } |
---|
337 | elseif ( 'image/png' == $mime_type ) { |
---|
338 | // convert from full colors to index colors, like original PNG. |
---|
339 | if ( function_exists('imageistruecolor') && ! imageistruecolor( $image ) ) |
---|
340 | imagetruecolortopalette( $image, false, imagecolorstotal( $image ) ); |
---|
341 | |
---|
342 | $compression = -((9/100*$this->quality)-9); |
---|
343 | |
---|
344 | if ( ! $this->make_image( $filename, 'imagepng', array( $image, $filename, $compression ) ) ) |
---|
345 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
---|
346 | } |
---|
347 | elseif ( 'image/jpeg' == $mime_type ) { |
---|
348 | if ( ! $this->make_image( $filename, 'imagejpeg', array( $image, $filename, apply_filters( 'jpeg_quality', $this->quality, 'image_resize' ) ) ) ) |
---|
349 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
---|
350 | } |
---|
351 | else { |
---|
352 | return new WP_Error( 'image_save_error', __('Image Editor Save Failed') ); |
---|
353 | } |
---|
354 | |
---|
355 | // Set correct file permissions |
---|
356 | $stat = stat( dirname( $filename ) ); |
---|
357 | $perms = $stat['mode'] & 0000666; //same permissions as parent folder, strip off the executable bits |
---|
358 | @ chmod( $filename, $perms ); |
---|
359 | |
---|
360 | return array( |
---|
361 | 'path' => $filename, |
---|
362 | 'file' => wp_basename( apply_filters( 'image_make_intermediate_size', $filename ) ), |
---|
363 | 'width' => $this->size['width'], |
---|
364 | 'height' => $this->size['height'], |
---|
365 | 'mime-type'=> $mime_type, |
---|
366 | ); |
---|
367 | } |
---|
368 | |
---|
369 | /** |
---|
370 | * Returns stream of current image. |
---|
371 | * |
---|
372 | * @since 3.5.0 |
---|
373 | * @access public |
---|
374 | * |
---|
375 | * @param string $mime_type |
---|
376 | */ |
---|
377 | public function stream( $mime_type = null ) { |
---|
378 | list( $filename, $extension, $mime_type ) = $this->get_output_format( null, $mime_type ); |
---|
379 | |
---|
380 | switch ( $mime_type ) { |
---|
381 | case 'image/png': |
---|
382 | header( 'Content-Type: image/png' ); |
---|
383 | return imagepng( $this->image ); |
---|
384 | case 'image/gif': |
---|
385 | header( 'Content-Type: image/gif' ); |
---|
386 | return imagegif( $this->image ); |
---|
387 | default: |
---|
388 | header( 'Content-Type: image/jpeg' ); |
---|
389 | return imagejpeg( $this->image, null, $this->quality ); |
---|
390 | } |
---|
391 | } |
---|
392 | } |
---|